"You kno its love when your boyfriend has elbow surgery 2 days ago and takes u to a #ravens game ... especially when he's a Bengals fan," Kiebler said via Twitter Sunday.
Jonathan Ogden, an ex-offensive lineman for the Ravens, also posted a photo of himself with Clooney, who was sporting an arm sling.
People.com said it is unclear why Clooney had the operation.
Clooney can now be seen in the Hawaii-set family drama "The Descendents."
Celebrity Families of 2014 [PHOTOS]
Meg Ryan, Kiernan Shipka to star in 'Fan Girl'